Perlick 575SSTF Perl Stainless Steel Faucet - Crea Creamer features finishes your pour with the perfect amount of head All Perl faucets include a stainless steel for strength and sanitation Pushing the Perl faucet handle back moves a stainless steel pison, exposing small holes. The turbulence created by beer passing through the holes produces a creamy head When the handle is released, an internal compression spring moves the pison back, stopping the beer